Pneumatic tire



arch i8 Y, 1924. 3,487,384

A` A. HOLLE l PNEUMATIC TIR.

Filed March ,14 1923 2 Sheets-Sheet 2 ma@ i..

Patented Mar. 18, 1924.

,j UNITED STATES PATENT OFFICE.

i ALEXANDER .ALBERT ROLLE, OF PADDINGTON, LONDON, ENGLAND.

PNEUMATIC TIRE.

Application flied March 14.1923.` seriaiNo. 625,097.

To ,all to/lw'mfz't may concern:

y Be it known that I, ALEXANDER' ALBERT HoLLE, a subject of the Queen 'of the Netherlands, residing at 60 `Oxford Terrace, Paddington, in' the administrative co-unty of London, England, have invented a new and useful Improvfment in Pneumatic Tires, of which the following is a full and complete specification. y 'i This invention relates tofpneumatic tires and has for its objecta construction which will enable the tire to fulfill its function and stand up to its work with a relatively low air pressure. A further object of the invention is to prevent creeping of the cover Y and/or the air tube either relative to one another or to the wheel rim on which the tire is mounted.

It is now realized that the high pressure at whichpneumatic tires have hitherto been inflated does not make either for maximum comfort or four maximum protection of the vehicle from damage or deterioration arising from road shocks or vibration, and that the necessity for high pressure in the past has arisen entirely from the form of construction and the method of attachment of the present type of pneumatic tire.

1 attain the objects of the invention by the construction hereinafter particularly described, shown in the accompanying draw- 'ing and specified in the appended claims.

In the accompanying drawing Fig. 1 is a view in transverse section of the complete tir.y and wheel rim, the left hand half of which is a section on line I, I Fig, 4l showing one part of the construction of the tire and the right hand half which is a section on line II, Il Fig. 4 showing another part of the construction of the tire, Fig. 2 is a broken view in side elevation of one of the circular bands for the enlarged edges forming the feet of the cover, and Fig. 3 is a similar view of an alternative form of band. Throughout the views similar parts are marked with like numerals of reference.

The cover 1 of the tire is made of the well-known straight-sided shape used with two-part wheel rims and its edges are so shaped as to form fiat bottomed feet 2 and 2. Said cover is reinforced by layers of cord 3 in the manner well-known in so called cord tires the loops of the cord of cach layer at each of the edges or feet of the cover being arranged in successive transversely arranged rows which are distributed throughout the width of said edgesv or feet. The loopsof the cord at each edge or foot of the cover engage projections 4 carried by plurality of hoops 5 which are arranged side by side in said feet or edges andare provided with a. series of holes 6 for the fixing bolts 7 to engage with. The rim 8 for carrying the tire is flat with a fixed flange 9 at one edge and a detachable flange 10 atthc other edge. The cover is secured' to the wheel rim by the transversely arranged bolts 7 which pass through both the flanges 9 and 10 of the wheel rim and through the feet 2 forming the edgis of the cover engaging the hoops 5 by the holes 6 therein so that said bolts also provide for the securing of the detachable flange to the main part of the wheel rim.

On the air tube 11 which is of the usual construction and provided with the usual inflation valve is an inwardly arranged radial flange 12 which is adapted to lie between the inner faces of the two feet 2 and 2 of the cover said flange being provided with a plurality of holes for the transverse bolts 7 to pass through thus securing the air tube against creeping.

It will thus be seen that the transverse bolts perforni three functions, viz. to secure the cover to the wheel rim, to secure the detachable flange tothe wheel rim. and to prevent both the cover and the air tube from creeping on the wheel rim.

T'he hoops 5 which may be either of ribbon form as shown in Figs. 1 and 2 orI of wire as shown in Fig. 3 may for convenience in building up the cover be madein segments in which case either the bolts 7 or auxiliary bolts are utilized to couple the adjacent segj ments together. When the hoops 5 are made of wire they are looped to provide a plurality of eyes 6 for the bolts 7 to pass through as shown in Fig. 3. This construction also -enables the bands to be made up of a pluenlarged edges of the cover, a series o'l" hoops located side by side in each of the feet of the cover and distributed through the width of saine said hoops being adapted to forni anchorages for the cord forming the reinforcing fabric of the cover, a riin vcoinprising a flat inain part a fixed flange at one edge of said part and a` detachable flange at the other edge of' said part, an air tube having a radial flange on its inner circumference, and a plurality of' transverse bolts passing through the flanges Vol" the rini, the feet of the arch-shaped cover and the hoops in saine and the radial flange of' the air tube.

2. A pneumatic tire comprising an archshaped cover having enlarged edges shaped to forni feet the reinforcing Vfabric of which consists of a plurality of layers 4of cord Wound over the arc-h ofthe cover and around anchorages in the feet of the cover, a plurality of hoops each made up of a series of segments said hoops being located side by side in each of the feet of the cover and adapted to forni anchorages for the loops of the cords lorniing the reinforcing fabric, a rim comprising a flat niain parthaving a fixed flange at one edge and a detachable flange `at the other edge, an air tube having a radial flange on its inner circumference, and 'a plurality of transverse bolts passing through the flanges of the rim, the feet of' the arch-shaped covenandl the radial flange of the air tube said bolts being also ernrploy'ed to connect together the segments of each of the hoops in the feet of the cover.

3. A pneumatic: tire comprising a cover the reinforcing fabric of which comprises a plurality of layers of cord labricthe edges of ivhich engage ancho-rages Vin the edges of the (over, a series of hoops located side by side in cachot the edges of the cover and distributed through the Width of saine said hoops being niade Vup offa plurality of segniente and eac-'h carrying a plurality of projectio'ns forini'ng anehorages for the cords forming the reinforcing fabric, a r-i'fn co1np'ris'ing a flat-1 main part having a JXed flange at. yone edge and al detachable flange at the other edge7 an air tube having afradial flange on its inner `circuinference adapted to fit between the edges of the cover, and a plurality of transverse bolts passing through the flanges of the 'rini the hoops in the edges of the cover and the radial' flange of the air tube.

ALEXANDER ALBERT HoLLE. 

